Help me plzzzzzz operiting system

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Write a c program to implement a First-Come- First-Serve (FCFS) and Shortest-Job-First (SJF) scheduling algorithms. Your program should first prompt the user to select which algorithm to use FCFS or SJF. Then, your program will input a list of process ID and burst time for each process to be run on the CPU. The list is terminated by 0 O for both the process ID and burst time. Your program should draw a Gantt chart that shows the scheduling order of the processes using the selected scheduling algorithm. Also print the turnaround and waiting time for each process along with the average turnaround and waiting times for all process. Make sure that you have a friendly user interface and display very helpful messages